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EP0074608A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Liquid crystal halogen compounds, process for their preparation, dielectric and dectrooptical display element containing them

Assignee: Merck Patent GmbH
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Filing: 1982-09-08
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Granted: —
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Expires: 2002-09-08
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Abstract

Abstract Translated from German Die Verbindungen der Formel worin der Ring A 1,4-Phenylen oder trans-1,4-Cyclohexylen, R 1 Alkyl oder Alkoxy mit 1 bis 12 Kohlenstoffatomen, oder, wenn A, 1,4-Phenylen ist, auch CN, R 2 Alkyl oder Alkoxy mit 1 bis 12 Kohlenstoffatomen, oder, wenn A 1,4-Cyclohexylen ist, auch Chlor oder Brom, und X Fluor, Chlor oder Wasserstoff bedeutet, mit der Maßgabe, daß mindestens einer der Substituenten R 2 und X ein Halogenatom ist, sind wertvolle Komponenten flüssigkristalliner Dielektrika für elektriooptische Anzeigevorrichtungen.The compounds of the formula wherein the ring A is 1,4-phenylene or trans-1,4-cyclohexylene, R 1 is alkyl or alkoxy having 1 to 12 carbon atoms, or, if A is 1,4-phenylene, also CN, R 2 is alkyl or alkoxy having 1 to 12 carbon atoms, or, if A is 1,4-cyclohexylene, also chlorine or bromine, and X denotes fluorine, chlorine or hydrogen, with the proviso that at least one of the substituents R 2 and X is a halogen atom, are valuable components of liquid crystalline dielectrics for electro-optical display devices.

Inventors

  • 👤 Rudolf Dr. Eidenschink
  • 👤 Michael Dr. Römer
  • 👤 Georg Weber

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-26 18:23
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3003; C07; C07C; C07C17/00; C07C17/093; C07C205/00; C07C205/06; C07C25/00; C07C25/18; C07C43/00; C07C43/02; C07C43/20; C07C43/225; C09K19/10; C09K19/12

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